Draw the eclipsed and staggered conformations of ethane and comment on the relative stabilities of the two conformations.

Draw the eclipsed and staggered conformations of ethane using Newman projection formula.

Describe the conformations of cyclohexanol. Comment on their stability.

Name the two extreme type of conformations of ethane.

Arrange the different type of conformations of butane in the decreasing order of stability.

How can an eclipsed conformation of ethane be converted into a staggered conformation ?

Predict the number of conformations of ethane molecule.

Conformations are different arrangements of atoms that are interconverted by rotation about single bond. In eclipsed conformation the C-H bond on one carbon is directly aligned with C-H bond on the adjacent carbon. The angle that separates a bond on one atom from a bond on a adjacent atom is called a dihedral angle. A staggered conformation with two larger groups 180^@ from each other is called anti. A stagged conformation with two larger group 60^@ from each other is called gauche. Which of the following is gauche conformer ?

Arrange the following conformations of n-butane according to their increasing stability : gauche-staggered (I), fully eclipsed (II),eclipsed (III) and -staggered (IV).

With respect to the conformers of ethane , which of the following statements is true ?

What are the two planar conformations of 1,3-butadiene ? Which conformation is less stable and why ?